MEASURING ACCESSIBILITY-PROGRAM REPORT I - OCCASIONAL PAPER NO 5

THIS REPORT, THE FIRST IN A SERIES DESIGNED TO EXAMINE "ACCESSIBILITY" AND ITS EFFECTS ON LAND USE AND HUMAN BEHAVIOR, SURVEYS THE PRESENT METHODS OF MEASURING ACCESSIBILITY. EXISTING MEASUREMENTS LAY STRESS ON TIME AND DISTANCE RELATIONSHIPS AT THE EXPENSE OF MORE DETAILED ATTENTION TO HUMAN BEHAVIORAL PROCESSES. SEVERAL FACTORS MAY AFFECT THE LEAST-EFFORT EVALUATION OF DISTANCE (I.E.,HUMAN PREFERENCE AMONG LOCATIONS IS PROPORTIONAL TO THE EFFORT NECESSARY TO TRAVEL TO THEM). THESE INCLUDE: (1) TIME COSTS; (2) NONLINEAR TRANSFORMATIONS OF DISTANCE IN HUMAN JUDGEMENTS (I.E., THE INHIBITING EFFECT OF A DISTANCE INCREMENT MAY VARY WITH THE INITIAL DISTANCE TO WHICH THE INCREMENT IS APPENDED); AND (3) DISTORTIONS OF SPACE BY "MENTAL MAPS" WHICH REFLECT VALUE JUDGMENTS IMPOSED BY THE INDIVIDUAL. THE CURRENT INDICES OF ACCESSIBILITY ARE DIVIDED BETWEEN TWO BROAD CATEGORIES: THOSE THAT EMPLOY ADAPTATIONS OR COMPONENTS OF MASS-GRAVITY INTERACTION MODELS; AND THOSE THAT EMPLOY NETWORK INTERACTION MODELS TO ACCOMMODATE A FACTOR TO REPRESENT "INTERVENING OPPORTUNITIES." DERIVATION OF EACH EMPIRICAL MODEL AND RELEVANT EQUATIONS ARE PROVIDED. IT IS CONCLUDED THAT THE BASIC SCHEME FOR CALCULATING ACCESSIBILITY VALUES IS SUFFICIENTLY STRAIGHTFORWARD, BUT PROBLEMS ARISE IN THE PREPARATION OF DATA INPUTS. WHILE THE IMPORTANCE OF ACCESSIBILITY IN HUMAN TRAVEL DECISIONS HAS BEEN DEMONSTRATED, ACCESSIBILITY MEASUREMENT HAS NOT PROVIDED FOR A SYSTEMATIC INTEGRATION OF MODAL PREFERENCE DATA OR FOR THE HYPOTHESIS THAT MODAL CHOICE MAY ECLIPSE DISTANCE FACTORS IN TRAVEL PLANNING. ALSO, VARIOUS KINDS OF ORIGINS AND DESTINATIONS (E.G., HOMES, SHOPPING, OFFICES, RECREATION) DIFFER IN NATURE AND THUS REFLECT EQUALLY DIFFERENT ACCESS-VALUE PATTERNS. /UMTA/

  • Supplemental Notes:
    • PROJ NO URT-7
  • Corporate Authors:

    Syracuse University

    Department of Geography
    Syracuse, NY  USA  13244
  • Authors:
    • Wilbanks, T J
  • Publication Date: 1970-10

Subject/Index Terms

Filing Info

  • Accession Number: 00241997
  • Record Type: Publication
  • Source Agency: Urban Mass Transportation Administration
  • Files: TRIS, USDOT
  • Created Date: Oct 23 1972 12:00AM